Underfeed stoker.



P. L. GROWE.

UNDERPEED STOKER.

APPLICATION FILED O0T.16, 1907.

976,048, Patented Nov. 15,1910.

PAUL L. CROWE, OF JERSEY CITY, NEW JERSEY.- V

UNDERFEED s'roKER'.

To all whom it may concern:

Be it'known that I, PAUL L. CRowE, citizen of the United States, and resident of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Underfee'd Stokers, of which the following is a specification.

This invention relates to underfeed stokers. q r j The object of the invention is to provide the same with a plurality of differently directed plungers and also to'provide means for'adjusting their travel with relation to' each other.

Referring to the drawin s: Figure 1 is a sectional elevation of af iel-chute, upon which is mounted a seriesof twyer blocks, and also showing a the plunger pushers mounted in the said chute.- Fig. 2 is a front elevation of two fuel chutes showing means for operating the plungers. Fig 3 1s a side, viewof the eccentrics detached. Fig. 4 is a cross sectional view of the eccentrics, taking through the center of Fig. 3. the central eccentric and shaft shown in full lines. Fig. 5 is'an elevation of the central orlarge eccentric detached. Fi 6 is a view of Fig.-

5 looking on the top 0 the large or central eccentric. Fig. -7 is a side view of .on' 0f the adjustable eccentrics detached. Fig. 8

is an edge, view of the adjustable eccentric as shown in Fig. 7. 1 NumerallO represents the fuel chute, and 12, are'conventional twyer blocks suitably located on the upper edge of the chute 10, said twyer. blocks 12, being adapted to distribute the ir into the. fuel bed in'its progress of com ustion.

Numerals 14, 15 and 16 are plun ers.

These plungers are'adapted to travel within zontally,

suitable guid ways formed in the bottom of the inclined fuel chute or trough 10, and leading into the interior of said chute. As will be observed, the plun ers each have a different travel, and; in or er to give them. their respective travel their ide ways are set at" different angles. 'P unger 14 will therefore travel-upwardly; plunger 15 horiand p unger 16 downwardly. Three results are therefore accomplished by the travel of the plun'gerss The plunger 14 lifts the fuel 11 the plunger 15 reaks the crust, and the lunger 16 removes the refuse from ofi the ottom of the inside of the chute. Theshape and siz'e of the plungeis Specification of Letters Patent. Application filed October 16, 1907. Serial No. 397,348.

Patented'Nov. 15, 1910.

- is no-t material to this invention, nor is the size and conditions of the fuel chute. If the chute is provided with a bottom air space then the guide ways for the plungers will pass through sameas shown in Fig. 1.

As the plungers have independent travels, a groupor series of eccentrics are employed to operate them, group mountedon the shaft 18 supported on the bottom of the fuel chute. This group of eccentrics comprises a large eccentric 20 and two ad-,

jus'table eccentrics 21 and,22. The large eccentric 20 operates the plunger 14; and the adjustable eccentrics 21 22 operate the plungers 15 and 16. respectively. The-plungers are placed ona line above each other on the chute; this osition will require some of the eccentric r s to be ofi-setted in order to bring those rods on a line with their respective plunger. f r j In the arrangement of the eccentricathe central eccentric 20 is mounted on the shaft 18.- This eccentric 20 isvprovided with out-' wardly extending hubs 28. Theportion A of each hub is extended in width, and pro-- vided with projections 32'33. Each hub is also provlded with a socket 25. hub 28 has mounted on it the adjustable eccentrics 21 and 22. In order to allow for Each this, each of the adjustable eccentrics is pro.-

vided with an elongated aperture 26 (see Fig. 7) conforming to the shape of the hubs 28 of the central eccentric, but longer, in

.are provided with notches 30 and 31.

2; is the adjustable screws, connected detachably, to each of the hubs 28 of the central eccentric b openings; of these sockets permit each screw to be'easily-mounted and removed.

In assembling,- the adjustable screws are first mounted on their respective lugs 29 of the adjustable eccentrics, then the said eccentrics'are passed'over the hubs 28"of the central eccentric, which is done bypassing the notches 30' and 31,0ver PIOjGGtlOIlS 32 the socket 25, but permitted to turn reely therein. The lateral.

and 33 and theheadmf each screw 24 passing into.,.its respective socket 25. Now, by

turning the said adjustable screw the eccentric to which it is connected will be adjusted on the hub of the large eccentric. The projections 32 and 33 will prevent the said adjustable eccentric from removing itself from the said hub.

The adjustable screws are each locked in osit-ion after adjusting-Hits eccentric by a ock nut 38. Each chute will have three .plungers, and there may be any number of 'rality of reciprocating fuel pushers adapted to operate through said openings, the angle between the path ofreciprocation of'each pusher and the bottom portion below said pusher decreasing from the upper to the lower end of said trough.

2. A stoker comprisin an inclined fuel trough having an air 0 amber formed in the bottom portion of said trough, the bottom of said trough bein provided with a plurality of openings, :1 p urality of reciprocating fuel pushers adapted to operate the said pushers.

3. A stoker comprising a plurality of similarly disposed inclined fuel troughs, said troughs each provided with bottom walls, said bottomwalls provided with a plurality of openings,.a plurality of reciproeating pushers adapted to operate through said openings, the an le'between the path of reciprocation of eac pusher and the bottomportion below said pusher decreasin from the upper to the lower end of,the sai trough, operating eccentrics, said eccentrics connected to said pushers, a shaft on which said eccentrics are mounted, said shaft mounted on the said troughs, said eccentrics grouped on said shaft'opposite said pushers, two of said eccentrics bein adjustable, said eccentrics adapted to regufite the throw of Signed at Jersey City in the county'of Hudson and State of New Jersey this 12th day of October A. D, 1907.

PAUL L. CROWE. 

